00:01
We're being asked to subtract 461 minus 239.
00:04
Well, to do this, i'm going to set this up vertically.
00:07
So i'm going to have 461 minus 239.
00:11
And remember, we start with our ones column.
00:13
So i'm being asked to take away nine ones away from one.
00:16
But that means i don't have enough.
00:18
So what i have to do is i have to borrow one from the tens.
00:22
So i'm going to take away one of my tens, so i'll be left with five.
00:25
And i'm going to add 10 ones onto the one that we already had, which means i'll now have 111s.
00:32
And now i have plenty to subtract.
00:34
Well, 11 minus 9 is 2...